You can't always judge a book by its cover. The skinny-fat walk amongst us, believing themselves to be thin, but their fat is around their internal organs.

http://news.bbc.co.uk/2/hi/health/6220596.stm


There are people who seem resistant to the ill effects of a high carb, high fructose diet, but they're a minority. Usually by the time you hit your mid-thirties or early forties your metabolism will be starting to show signs of breaking down.

Now that I'm in my 50's I see all my formerly skinny friends are getting fat and sick. They really have no clue why and just chalk it up to old age.